Bài 1: Một thửa ruộng hình thang vuông có cạnh bên vuông góc với hai đáy dài 20,5m, đáy lớn 110,4m , đáy bé 79,6m. Trung bình mỗi dam thu hoạch được 62kg thóc. Hỏi thửa ruộng đó thu hoạch được bao nhiêu kg thóc?

Bài 2: Một mảnh đất hình thang có đáy nhỏ là 32,4m; đáy lớn bằng  đáy nhỏ, chiều cao là 18m. Người ta để diện tích mảnh đất làm nhà. Hỏi diện tích mảnh đất còn lại là bao nhiêu?

Bài 3:  Bán kính của một bánh xe ô tô là 0,6 m. Tính xem khi bánh xe lăn trên mặt đất 15 vòng; 35 vòng thì xe đó đi được bao nhiêu m?

Bài 4.  Một  xe đạp 3 bánh của trẻ em có bán kính bánh  trước là 3 dm, bán kính bánh sau là 2dm. Hỏi bán kính bánh trước lăn 20 vòng, thì bán kính bánh sau lăn bao nhiêu vòng?

Bài 5: Hình bình hành ABCD có AB = 9 dm, AH = 6,4 dm;  DH = 3 dm .Tính diện tích hình thang ABCH. ( Vẽ hình  rồi tính)

Bài 6.  Một miếng đất hình thang có diện tích 1056 m. Biết rằng nếu tăng đáy bé thêm 4 m thì được hình thang mới có diện tích bằng 1108 m. Tìm độ dài mỗi đáy của miếng đất. Biết đáy lớn hơn đáy bé 12,5m.

Giúp mình với nhé 12h hnay là phải nộp Rồi. CẢM ƠN

Cho hai hình hình tròn như hình vẽ. Chu vì hình tròn lớn là 37,68 cm.Chu vi hình tròn nhỏ là 25,12 cm.Tính diện tích phần tô màu.(xin lỗi các bạn vì mk ko bt cách tô tren đây nên phải để mũi tên)

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